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Confidence: Medium · Source: FCC ULS · As of 2026-09-14

W7KOA callsign genealogy

Currently held by BILLINGTON, WILLIAM R

The FCC publishes a previous_call_sign on every amateur license — a self-link to the licensee's prior callsign. Following those links produces the chain below.

Previous callsigns

Older callsigns held by W7KOA's current licensee, walking backwards.

  1. K7FRNactive· T
    Olsen, Cameron DMTgranted 2019-03-09
  2. KJ7DTMcancelled· T
    Olsen, Cameron DWYgranted 2019-02-12cancelled 2019-03-09

Successor callsigns

Callsigns held now by people who previously held W7KOA.

  1. K5RVScancelled· T
    BILLINGTON, WILLIAM RTXgranted 2011-04-26cancelled 2012-01-24

All historical holders

Every license row we've seen with the callsign W7KOA, oldest first.

  • BILLINGTON, WILLIAM R TX
    2008-05-10 → cancelled 2011-04-26
  • MAC LEOD, ROMEL S AZ
    2023-02-25 active
← Back to W7KOA License history →